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The ground-state energies of one-electron homonuclear quasi-molecules for the nuclear charge number in the range Z=1-100 at the “chemical” distances R=2/Z (in a.u.) are calculated. The calculations are performed for both point- and extended-charge nucleus cases using the Dirac–Fock–Sturm approach with the basis functions constructed from the one-center Dirac–Sturm orbitals. The critical distances...
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